![]() ![]() A community for current or aspiring technical professionals to discuss cybersecurity, threats, etc. Huntress says companies with servers that have already been compromised should restore their systems from a backup created prior to Dec. VMware Horizon servers are under active exploit by Iranian state hackers : cybersecurity 346k members in the cybersecurity community. ![]() VMware has advised Horizon users to update to new versions of the software with patches for the Log4Shell vulnerabilities. Huntress says "that ~34% of the 180 Horizon servers (62) we analyzed were unpatched and internet-facing at the time of this publication." It also notes that the Shodan search tool lists roughly 25,000 internet-facing Horizon servers. Security researchers observed malicious campaigns leveraging a critical vulnerability in VMware Workspace One Access to deliver various malware, including the. Plenty of people will have some pondering to do. "For those of you just learning about the mass exploitation of VMware Horizon servers and the installation of backdoor web shells," Huntress says, "you should seriously consider the possibility that your server is compromised if it was unpatched and internet-facing." The former can offer attackers initial access to a network the latter can help them maintain that access so they can gather more information, compromise additional machines, and potentially evade detection. After obtaining access, some actors implanted loader malware on compromised systems with embedded executables enabling remote C2. 'As part of this exploitation, suspected APT actors implanted loader malware on. Since December 2021, multiple cyber threat actor groups have exploited Log4Shell on unpatched, public-facing VMware Horizon and UAG servers to obtain initial access to networks. Others, including The DFIR Report and Red Canary, reported similar activity that day.Įxploiting the Log4Shell vulnerabilities to deploy Cobalt Strike makes sense. According to the CISA, cyber threat actors, including state-sponsored advanced persistent threat actors, have continued to exploit Log4Shell in unpatched, internet-facing VMware Horizon and Unified Access Gateway servers to obtain initial access to organizations. Huntress says that "an unrelated Managed Antivirus detection (Microsoft Defender) tipped our ThreatOps team to new exploitation of the Log4Shell vulnerability in VMware Horizon" on Jan. The prolific Russian-speaking ransomware group on Wednesday began exploiting the Log4j vulnerability for initial access and lateral movement on VMware vCenter networks, according to a report from. ![]() (Among other things.) But hackers often use cracked versions of the software to conduct attacks, too. ![]()
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